2011/8/22 Matt K. Jeon <mattkj...@gmail.com>:
> Hello All,
>
> I am suffering from enabling "pxa2xx-ac97" driver at kernel version 2.6.35.
> There are 2 different points of registering platform drivers in
> different source code;
> - sound/arm/pxa2xx-ac97.c through pxa2xx_ac97_init()
> static struct platform_driver pxa2xx_ac97_driver = {
> .probe = pxa2xx_ac97_driver_probe,
> .remove = __devexit_p(pxa2xx_ac97_remove),
> .driver = {
> .name = "pxa2xx-ac97",
> .owner = THIS_MODULE,
> #ifdef CONFIG_PM
> .pm = &pxa2xx_ac97_pm_ops,
> #endif
> },
> };
>
> - sound/soc/pxa/pxa2xx-ac97.c through pxa_ac97_init()
> static struct platform_driver pxa2xx_ac97_driver = {
> .probe = pxa2xx_ac97_dev_probe,
> .remove = __devexit_p(pxa2xx_ac97_dev_remove),
> .driver = {
> .name = "pxa2xx-ac97",
> .owner = THIS_MODULE,
> },
> };
>
> those are the same name of functions and the name of each drivers are
> the same so,
> when try to register the later driver at platform driver, it complains
> that a driver is already registered with the same name at
>
> other = driver_find(drv->name, drv->bus);
> if (other) {
> put_driver(other);
> printk(KERN_ERR "Error: Driver '%s' is already registered, "
> "aborting...\n", drv->name);
> return -EBUSY;
> }
>
> above code compares 2 drivers with each driver's name!!!
>
> Any idea?
>
>
> Of course I had changed the name of one driver to something different
> and the result is fine but in that case DAI (digital audio interface)
> couldn't be registered at device (soc ac97), because DAI registering
> procedure compares the addresses of each drivers not name!!!
>
> Thanks in advance,
> Matt
>
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